Scathis is still OP on certain small maps. Here is a replay of good isis players: all over 1800+ (POSTAL, DoshNEGGER, BC_Cpt_Chlorgas, and BC_Blackheart) where the BC team easy wins with a scathis:
The team that built the scathis had a heavily defended forward area with lots of T3 PD. DoshNEGGERs fatboys were not effective and POSTAL's ythothas could not be used until the T3 PD was destroyed. Only long ranged attacks (15+ t2 arty and mobile t3 arty) protected by shields could have taken out BC team's front defensive area and allowed them to push through with T3/T4.
Scathis is only 63,000 mass and can be built within minutes with good combined ecos. Despite its short range it is very effective on smaller 10x10 maps such as isis but only if you heavily defend it. The problem is that it is far too cheap and does "gameender" style damage in a short amount of time.
Sure the LHS team could have built many strat bombers and taken it out, but the right team could easily rebuild it in 2-3 minutes. Teleported scus would not have been successful either as they would get instantly killed by the T3 pd.
Replay attached...